Package jakarta.persistence
Annotation Type JoinColumns
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@Target({METHOD,FIELD}) @Retention(RUNTIME) public @interface JoinColumns
Specifies the mapping for composite foreign keys. This annotation groupsJoinColumn
annotations for the same relationship.When the
JoinColumns
annotation is used, both thename
and thereferencedColumnName
elements must be specified in each suchJoinColumn
annotation.Example: @ManyToOne @JoinColumns({ @JoinColumn(name="ADDR_ID", referencedColumnName="ID"), @JoinColumn(name="ADDR_ZIP", referencedColumnName="ZIP") }) public Address getAddress() { return address; }
- Since:
- 1.0
- See Also:
JoinColumn
,ForeignKey
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Required Element Summary
Required Elements Modifier and Type Required Element Description JoinColumn[]
value
The join columns that map the relationship.
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Optional Element Summary
Optional Elements Modifier and Type Optional Element Description ForeignKey
foreignKey
(Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect.
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Element Detail
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value
JoinColumn[] value
The join columns that map the relationship.
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foreignKey
ForeignKey foreignKey
(Optional) Used to specify or control the generation of a foreign key constraint when table generation is in effect. If both this element and theforeignKey
element of any of theJoinColumn
elements are specified, the behavior is undefined. If no foreign key annotation element is specified in either location, the persistence provider's default foreign key strategy will apply.- Since:
- 2.1
- Default:
- @jakarta.persistence.ForeignKey(jakarta.persistence.ConstraintMode.PROVIDER_DEFAULT)
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